1. Application
Rubber corks are used for:
- Sealing laboratory flasks, test tubes, burettes, and reagent bottles
- Temporary or semi-permanent closure of glassware
- Air-tight sealing during chemical reactions
- Microbiology and culture applications
- Gas delivery setups (with bored corks)
- Educational laboratory experiments
Widely used in chemical, pharmaceutical, dairy, environmental, and academic laboratories.
2. Compliance Standard
- Manufactured under ISO 9001 Quality Management System
- Conforms to general laboratory-grade material standards
- Non-toxic and laboratory-safe composition
- Suitable for GLP-compliant laboratory use
(Specific regulatory compliance depends on manufacturer and material type.)
3. Product Description
Rubber corks are tapered sealing plugs made from high-quality natural rubber or synthetic elastomer. They are designed to provide a secure and leak-proof fit in laboratory glassware.
Available in:
- Solid type (plain)
- Single-bore (1 hole)
- Double-bore (2 holes)
- Custom bored configurations
The tapered design ensures tight sealing while allowing easy insertion and removal.
4. Technical Specifications
|
Parameter |
Specification |
|
Material |
Natural Rubber / Neoprene / Synthetic Elastomer |
|
Color |
Black / Brown |
|
Shape |
Tapered (conical) |
|
Type |
Solid / 1-hole / 2-hole |
|
Hardness |
40–60 Shore A (approx.) |
|
Temperature Resistance |
Up to 100°C (short duration) |
|
Chemical Resistance |
Moderate (not suitable for strong solvents & concentrated acids) |
|
Surface Finish |
Smooth, non-porous |
|
Reusability |
Yes |
5. Apparatus is Supplied
- Rubber cork (as per selected size and type)
- Bulk packaging (pack of 10 / 50 / 100 pieces depending on order)
6. Optional Accessories
- Glass tubing
- Delivery tubes
- Bunsen burner assembly
- Retort stand & clamps
- Flask and test tubes
- Cork borers (for custom hole making)
7. Common Sizes Available
Rubber corks are available in standard numbered sizes:
Size Range:
No. 000, 00, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16
(Custom sizes available on request.)
8. Dimensions & Weight (Approx.)
|
Size No. |
Top Diameter (mm) |
Bottom Diameter (mm) |
Height (mm) |
Approx. Weight |
|
0 |
12 |
9 |
20 |
5–8 g |
|
3 |
19 |
15 |
22 |
8–15 g |
|
5 |
26 |
21 |
25 |
15–25 g |
|
8 |
32 |
27 |
30 |
25–40 g |
|
10 |
38 |
32 |
35 |
40–60 g |
|
12 |
44 |
36 |
38 |
60–80 g |
|
14 |
50 |
42 |
40 |
80–120 g |
|
16 |
58 |
48 |
45 |
120–180 g |
Note: Dimensions may slightly vary depending on manufacturer.